2 * Copyright (C) 2014-2015 Samsung Electronics
3 * Przemyslaw Marczak <p.marczak@samsung.com>
5 * SPDX-License-Identifier: GPL-2.0+
11 #include <dm/uclass-internal.h>
12 #include <power/pmic.h>
13 #include <power/regulator.h>
15 DECLARE_GLOBAL_DATA_PTR;
17 int regulator_mode(struct udevice *dev, struct dm_regulator_mode **modep)
19 struct dm_regulator_uclass_platdata *uc_pdata;
23 uc_pdata = dev_get_uclass_platdata(dev);
27 *modep = uc_pdata->mode;
28 return uc_pdata->mode_count;
31 int regulator_get_value(struct udevice *dev)
33 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
35 if (!ops || !ops->get_value)
38 return ops->get_value(dev);
41 int regulator_set_value(struct udevice *dev, int uV)
43 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
44 struct dm_regulator_uclass_platdata *uc_pdata;
46 uc_pdata = dev_get_uclass_platdata(dev);
47 if (uc_pdata->min_uV != -ENODATA && uV < uc_pdata->min_uV)
49 if (uc_pdata->max_uV != -ENODATA && uV > uc_pdata->max_uV)
52 if (!ops || !ops->set_value)
55 return ops->set_value(dev, uV);
59 * To be called with at most caution as there is no check
60 * before setting the actual voltage value.
62 int regulator_set_value_force(struct udevice *dev, int uV)
64 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
66 if (!ops || !ops->set_value)
69 return ops->set_value(dev, uV);
72 int regulator_get_current(struct udevice *dev)
74 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
76 if (!ops || !ops->get_current)
79 return ops->get_current(dev);
82 int regulator_set_current(struct udevice *dev, int uA)
84 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
85 struct dm_regulator_uclass_platdata *uc_pdata;
87 uc_pdata = dev_get_uclass_platdata(dev);
88 if (uc_pdata->min_uA != -ENODATA && uA < uc_pdata->min_uA)
90 if (uc_pdata->max_uA != -ENODATA && uA > uc_pdata->max_uA)
93 if (!ops || !ops->set_current)
96 return ops->set_current(dev, uA);
99 bool regulator_get_enable(struct udevice *dev)
101 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
103 if (!ops || !ops->get_enable)
106 return ops->get_enable(dev);
109 int regulator_set_enable(struct udevice *dev, bool enable)
111 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
113 if (!ops || !ops->set_enable)
116 return ops->set_enable(dev, enable);
119 int regulator_get_mode(struct udevice *dev)
121 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
123 if (!ops || !ops->get_mode)
126 return ops->get_mode(dev);
129 int regulator_set_mode(struct udevice *dev, int mode)
131 const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
133 if (!ops || !ops->set_mode)
136 return ops->set_mode(dev, mode);
139 int regulator_get_by_platname(const char *plat_name, struct udevice **devp)
141 struct dm_regulator_uclass_platdata *uc_pdata;
147 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev;
148 ret = uclass_find_next_device(&dev)) {
152 uc_pdata = dev_get_uclass_platdata(dev);
153 if (!uc_pdata || strcmp(plat_name, uc_pdata->name))
156 return uclass_get_device_tail(dev, 0, devp);
159 debug("%s: can't find: %s\n", __func__, plat_name);
164 int regulator_get_by_devname(const char *devname, struct udevice **devp)
166 return uclass_get_device_by_name(UCLASS_REGULATOR, devname, devp);
169 int device_get_supply_regulator(struct udevice *dev, const char *supply_name,
170 struct udevice **devp)
172 return uclass_get_device_by_phandle(UCLASS_REGULATOR, dev,
176 int regulator_autoset(struct udevice *dev)
178 struct dm_regulator_uclass_platdata *uc_pdata;
181 uc_pdata = dev_get_uclass_platdata(dev);
182 if (!uc_pdata->always_on && !uc_pdata->boot_on)
185 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV)
186 ret = regulator_set_value(dev, uc_pdata->min_uV);
187 if (!ret && (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA))
188 ret = regulator_set_current(dev, uc_pdata->min_uA);
191 ret = regulator_set_enable(dev, true);
196 static void regulator_show(struct udevice *dev, int ret)
198 struct dm_regulator_uclass_platdata *uc_pdata;
200 uc_pdata = dev_get_uclass_platdata(dev);
202 printf("%s@%s: ", dev->name, uc_pdata->name);
203 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV)
204 printf("set %d uV", uc_pdata->min_uV);
205 if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA)
206 printf("; set %d uA", uc_pdata->min_uA);
207 printf("; enabling");
209 printf(" (ret: %d)", ret);
213 int regulator_autoset_by_name(const char *platname, struct udevice **devp)
218 ret = regulator_get_by_platname(platname, &dev);
222 debug("Can get the regulator: %s!", platname);
226 return regulator_autoset(dev);
229 int regulator_list_autoset(const char *list_platname[],
230 struct udevice *list_devp[],
234 int error = 0, i = 0, ret;
236 while (list_platname[i]) {
237 ret = regulator_autoset_by_name(list_platname[i], &dev);
238 if (ret != -EMEDIUMTYPE && verbose)
239 regulator_show(dev, ret);
252 static bool regulator_name_is_unique(struct udevice *check_dev,
253 const char *check_name)
255 struct dm_regulator_uclass_platdata *uc_pdata;
257 int check_len = strlen(check_name);
261 for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev;
262 ret = uclass_find_next_device(&dev)) {
263 if (ret || dev == check_dev)
266 uc_pdata = dev_get_uclass_platdata(dev);
267 len = strlen(uc_pdata->name);
268 if (len != check_len)
271 if (!strcmp(uc_pdata->name, check_name))
278 static int regulator_post_bind(struct udevice *dev)
280 struct dm_regulator_uclass_platdata *uc_pdata;
281 int offset = dev_of_offset(dev);
282 const void *blob = gd->fdt_blob;
283 const char *property = "regulator-name";
285 uc_pdata = dev_get_uclass_platdata(dev);
289 /* Regulator's mandatory constraint */
290 uc_pdata->name = fdt_getprop(blob, offset, property, NULL);
291 if (!uc_pdata->name) {
292 debug("%s: dev: %s has no property 'regulator-name'\n",
293 __func__, dev->name);
294 uc_pdata->name = fdt_get_name(blob, offset, NULL);
299 if (regulator_name_is_unique(dev, uc_pdata->name))
302 debug("\"%s\" of dev: \"%s\", has nonunique value: \"%s\"",
303 property, dev->name, uc_pdata->name);
308 static int regulator_pre_probe(struct udevice *dev)
310 struct dm_regulator_uclass_platdata *uc_pdata;
311 int offset = dev_of_offset(dev);
313 uc_pdata = dev_get_uclass_platdata(dev);
317 /* Regulator's optional constraints */
318 uc_pdata->min_uV = fdtdec_get_int(gd->fdt_blob, offset,
319 "regulator-min-microvolt", -ENODATA);
320 uc_pdata->max_uV = fdtdec_get_int(gd->fdt_blob, offset,
321 "regulator-max-microvolt", -ENODATA);
322 uc_pdata->min_uA = fdtdec_get_int(gd->fdt_blob, offset,
323 "regulator-min-microamp", -ENODATA);
324 uc_pdata->max_uA = fdtdec_get_int(gd->fdt_blob, offset,
325 "regulator-max-microamp", -ENODATA);
326 uc_pdata->always_on = fdtdec_get_bool(gd->fdt_blob, offset,
327 "regulator-always-on");
328 uc_pdata->boot_on = fdtdec_get_bool(gd->fdt_blob, offset,
329 "regulator-boot-on");
331 /* Those values are optional (-ENODATA if unset) */
332 if ((uc_pdata->min_uV != -ENODATA) &&
333 (uc_pdata->max_uV != -ENODATA) &&
334 (uc_pdata->min_uV == uc_pdata->max_uV))
335 uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UV;
337 /* Those values are optional (-ENODATA if unset) */
338 if ((uc_pdata->min_uA != -ENODATA) &&
339 (uc_pdata->max_uA != -ENODATA) &&
340 (uc_pdata->min_uA == uc_pdata->max_uA))
341 uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UA;
346 int regulators_enable_boot_on(bool verbose)
352 ret = uclass_get(UCLASS_REGULATOR, &uc);
355 for (uclass_first_device(UCLASS_REGULATOR, &dev);
357 uclass_next_device(&dev)) {
358 ret = regulator_autoset(dev);
359 if (ret == -EMEDIUMTYPE) {
364 regulator_show(dev, ret);
372 UCLASS_DRIVER(regulator) = {
373 .id = UCLASS_REGULATOR,
375 .post_bind = regulator_post_bind,
376 .pre_probe = regulator_pre_probe,
377 .per_device_platdata_auto_alloc_size =
378 sizeof(struct dm_regulator_uclass_platdata),